Alevel数学:加法公式和双角公式 Addition and Double Angle Formulae

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摘要:If you don’t know your key trig values already, now would be the time to learn!

We’re now about to take a look at some formulae which describe angle addition.

If you don’t know your key trig values already, now would be the time to learn!

Make sure you are happy with the following topics before continuing.

Basic Trig Identities

来源:安娜说留学

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